/**
 * Created with IntelliJ IDEA.
 * Description:
 * User: 25228
 * Date: 2024-09-30
 * Time: 19:12
 */

import java.util.Scanner;
public class Main8 {
    public static void main(String[] args) {
        Scanner in =new Scanner(System.in);
        double weight = in.nextDouble();
        double height = in.nextDouble();
        BMICalculator bmiCalculator = new BMICalculator();
        double bmi = bmiCalculator.getBMI(weight, height);
        System.out.println(bmi);
    }
}

class BMICalculator {
    public double getBMI(double w, double h) {
        double j=0.45359237*w;
        double icn=0.0254*h;
        return j/(icn*icn);
    }
}



